Umbra

Very high resolution 25 cm SAR satellite imagery, acquired worldwide with a revisit rate of 4 times a day.


Overview

Umbra is a constellation of microsatellites equipped with an X-band and capturing SAR imagery in 25 cm, 35 cm, 50 cm, and 1 m azimuth resolutions. See more on the marketplace.

This collection provides the following processing levels:

  • Geocoded Ellipsoid Corrected (GEC)
  • Sensor Independent Complex Data (SICD)
  • Sensor Independent Derived Data (SIDD)
  • Compensated Phase History Data (CPHD)

Umbra imagery of Buenos Aires (Argentina)

Geographic coverage

The geographic coverage is global.

Geometry type

This collection accepts POIs. You will get a full scene centered on the defined POI.

Specifications

General

SpecificationDescription
Collection typeTasking
Product typeSAR
System typeSatellite

Data

SpecificationDescription
Azimuth resolution25 cm (very high)
35 cm (very high)
50 cm (high)
1 m (high)
Ground range resolutionFrom 25 cm to 1 m
Processing levelGEC: multi-looked, geocoded, and projected onto the WGS84 ellipsoid
SICD: single-looked, slant plane range-doppler geometry
SIDD: multi-looked, planar gridded display projected
CPHD: raw phase history data, compensated for hardware timing and platform motion

The ordered tasking data will include GEC, SICD, SIDD, and CPHD products.
Bit depth per pixel8-bit
Standard deliveryA ZIP file containing the following files:
  • Data (GEC: GeoTIFF; SICD, SIDD: NITF; CPHD: CPHD)
  • Metadata (JSON)

System

SpecificationDescription
Imaging modeSpotlight
Incidence angleFrom 10° to 75°
Slant range resolutionFrom 35 cm to 1 m
OrbitSun-synchronous, at 450–600 km
Orbit directionAscending
Descending
Tasking priorityStandard
PolarizationSingle: HH, VV
Radar signal informationGEC: amplitude
SICD: amplitude, phase
SIDD: amplitude
CPHD: raw phase history data
Revisit rate4 revisits a day
Swath width4 km

Band

SpecificationDescription
Frequency bandX-band: 9.8 GHz

Geographic reference

SpecificationDescription
Coordinate reference systemUTM-WGS84
Georeferencing accuracy< 15 m CE99

Limitations

LimitationValue
Full scene size4×4 km

UP42 data products

DescriptionData product IDCollection name
Customfe2d291a-d065-481e-a083-aa2c7b901be8umbra-tasking